docs: def _validate_templates(self, app, files, verbose):
          """
          If tree is true, then will display the track of template extend or include
          """
          from uliweb import application
          from uliweb.core.template import template_file
          from uliweb.utils.common import trim_path
  
          app.template_loader.log = None
          for f in files:
              try:
                  t = app.template_loader.load(f)
                  if verbose:
                      print 'PASSED', f
              except Exception as e:
                  print 'FAILED', f, str(e)